Aktham b. Ṣayfī is a semi-legendary figure of pre-Islamic Arabia. The sources portray him as a judge, sage, and poet, from the Usayyid branch of the Tamīm tribe, but otherwise very few details of his life are known with certainty. He is counted among the muʿammarūn -people famous for their alleged longevity-and his lifespan is given variously as 130, 190, 200, or 330 years. The earlier sources do not provide his date of death, while later sources assume that he died around 8/630, probably by extrapolation